I hear you, I know Martin custom audio does a lot of nice work and also has a big selection of different types of tonal woods to use, and also Vibrolabs makes two different types of wood cups that you can purchase from them. You can also take your cups apart and push holes though the felt on the back of the drivers to increase the bass yourself.

I kinda want to send the headphones to someone and have them do it so I don't screw anything up

The pictures you posted of the wood Grado's with the leather pads were made by Martin Custom Audio.